// Test si IP autorisée
if(isset($_SERVER["HTTP_CF_CONNECTING_IP"])){
    //If it does, assume that PHP app is behind Cloudflare.
    $ipAddress = $_SERVER["HTTP_CF_CONNECTING_IP"];
} else{
    //Otherwise, use REMOTE_ADDR.
    $ipAddress = $_SERVER['REMOTE_ADDR'];
}



        // blocage
        $fp = fopen("access_log", 'a');
        fwrite($fp, $ipAddress."\r\n");
        fclose($fp);
        echo("Not Authorized ! IP Logged !");